Digital BW, The Print

In a message dated 3/25/06 7:34:36 AM, mark@... writes:


> Did you acquire it for free? Depends on what you are going to use it 
> for, the $50 for the calibration strip is well worth it. You can do 
> the "math way" of using your densitometer or get some profiling 
> software and start making your own profiles. It will save you time 
> and money on paper and ink in the long run.
> 

This is a densitometer (one we have been routinely replacing and tossing in 
the trash for several years at all sites that still had them) and cannot be 
used to make profiles, it can only be used for simple linearization functions.

C. David Tobie
Product Technology Manager
ColorVision, Inc.
CDTobie@...
www.colorvision.com


[Non-text portions of this message have been removed]

Yeah, but for what I want it for, linearization is all I need...  I'm
doing Quadtone RIP ink curves, and a linear and reasonably precise
densitometer is all I really need for this.  Might you have any of the
old calibration strips for this beast?

DRK

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, CDTobie@... wrote:

> 
> This is a densitometer (one we have been routinely replacing and
tossing in 
> the trash for several years at all sites that still had them) and
cannot be 
> used to make profiles, it can only be used for simple linearization
functions.

> 
> C. David Tobie
> Product Technology Manager
> ColorVision, Inc.
> CDTobie@...
> www.colorvision.com
> 
> 
> [Non-text portions of this message have been removed]
>

In a message dated 3/25/06 11:46:42 AM, davidkeasey@... writes:


> Yeah, but for what I want it for, linearization is all I need...  I'm
> doing Quadtone RIP ink curves, and a linear and reasonably precise
> densitometer is all I really need for this.  Might you have any of the
> old calibration strips for this beast?
> 

I doubt that any of the shops I removed them from could have even found them. 
The usual life history of a DTP32 in copy shops is that its been unused for 
years, they've changed RIPs and don't have software to linearize with it any 
more, wonder what they should do with it ('cause they remember thry paid lots 
for it) but the guy that was trained to use it left long ago, and the manual, 
calibration strip, etc... are long lost. The DTP32 itself will be in a junk 
drawer with three or four old proprietary monitor calibrators for monitors that 
died long ago.

C. David Tobie
Product Technology Manager
ColorVision, Inc.
CDTobie@colorvision.com
www.colorvision.com


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In a message dated 3/25/06 3:51:32 PM, dfaprinting@... writes:


> As far as I've found, the DTP32 will not make profiles with any
> modern software. I have one sitting here.
> 

True, but its simpler than that: the data from a densitimeter does not 
contain the necessary information to build color profiles, end of story.

C. David Tobie
Product Technology Manager
ColorVision, Inc.
CDTobie@...
www.colorvision.com


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It's amazing how EFI sold so many extraordinarily expensive
proprietary hardware software systems performing basically the same
task and using what? Why, DTP32's and mouseitometers. Maybe someone
ought to sue them for having such chutzpa.

Regards
Duane


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, CDTobie@... wrote:

>  but its simpler than that: the data from a densitimeter does not 
> contain the necessary information to build color profiles, end of story.
> 
> C. David Tobie
> Product Technology Manager
> ColorVision, Inc.
> CDTobie@...
> www.colorvision.com
> 
> 
> [Non-text portions of this message have been removed]
>

In a message dated 3/25/06 5:03:22 PM, dlruckus@... writes:


> It's amazing how EFI sold so many extraordinarily expensive
> proprietary hardware software systems performing basically the same
> task and using what? Why, DTP32's and mouseitometers. Maybe someone
> ought to sue them for having such chutzpa.
> 

Linearlzation is a great thing to do, and channel curves can be a very 
effective tool for smoothing channels. But they are not the same a full color 
readings and three dimensional lookup tables. Over the years I have had to explain 
to dozens of unknowledgable DTP32 owners why the expensive device they already 
owned wasn't sufficient to build ICC profiles for their printers. A 
densitimeter can tell you very nicely whether each step in a magenta ramp is too light 
or too dark, but it will never tell you whether its too red or too blue. It is 
simply the wrong tool for that job.

C. David Tobie
Product Technology Manager
ColorVision, Inc.
CDTobie@...
www.colorvision.com


[Non-text portions of this message have been removed]